Excessive Oil Consumption
11-30-2013 | 03:47 PM
#11
Moderator
Joined: 01-23-2009
Posts: 25,339
From: Fredericksburg,VA
I'm having a similar problem, with oil seeming to seep out of that hose going into the block. Is there a seal there to possibly be replaced that would stop the seeping? Or is it just a matter of aging/miles. I have an 06 with 94k and I recently switched over to full synthetic/high mileage within the last 10k or so.
That is the PCV hose, it should have clamps on both ends. I recently found out that the clamp makes a huge difference. Vacuum leak and oil consumption both are affected, you might even get a CEL code telling you the cat or O2 sensors are bad (P0171, P0420 etc.).
If you are burning oil, "High Mileage" blend may be a bad idea. They usually have extra zinc in them, zinc in the catalyst is a very bad thing.
11-30-2013 | 06:39 PM
#12
Member
Joined: 08-18-2010
Posts: 33
From: Fargo, ND
It isn't that, I wish I knew the technical term for it. Its the "hose" that comes out of the top of the engine up through the housing for the air filter and on the end is the filler cap. It seems to be leaking from where that hose goes into the valve cover.
11-30-2013 | 08:04 PM
#15
Platinum Member
Joined: 12-06-2009
Posts: 11,431
From: Alabama
Took me a while to find a picture( gotta love the Search function. 
)
Is this the tube you're talking about?
Attachment 15443
)Is this the tube you're talking about?
Attachment 15443
Last edited by firemangeorge; 05-30-2014 at 11:07 PM.
11-30-2013 | 09:22 PM
#18
Moderator
Joined: 01-23-2009
Posts: 25,339
From: Fredericksburg,VA
It unscrews just like the cap. You could put the cap in it's place. There is a rubber gasket at the base of it, you should be able to get a new one from your friendly local GM dealer Parts Department.
I am assUmeing that you are talking about raw oil leaking out of that intersection.
That one can also cause vacuum leakage and ensuing problems.
I am assUmeing that you are talking about raw oil leaking out of that intersection.
That one can also cause vacuum leakage and ensuing problems.
12-08-2013 | 11:22 AM
#19
Senior Member
Joined: 08-29-2007
Posts: 256
From: CenCoast California
Since our '07 got to about 70,000 miles I've noted increased oil use. It's now just over 100,000 miles and oil use is one qt. for every 500-1000 miles.
The engine has no external leaks.
As anyone here had trouble with valve guide wear and/or valve stem seal wear on the two-four?
The engine has no external leaks.
As anyone here had trouble with valve guide wear and/or valve stem seal wear on the two-four?
12-08-2013 | 11:39 AM
#20
Moderator
Joined: 01-23-2009
Posts: 25,339
From: Fredericksburg,VA
Since our '07 got to about 70,000 miles I've noted increased oil use. It's now just over 100,000 miles and oil use is one qt. for every 500-1000 miles.
The engine has no external leaks.
As anyone here had trouble with valve guide wear and/or valve stem seal wear on the two-four?
The engine has no external leaks.
As anyone here had trouble with valve guide wear and/or valve stem seal wear on the two-four?
But first rule out the easy cheap things. oil cap seal,PCV system,EVAP system & etc. Also you could give Sea Foam a try to loosen up the piston rings. After or all that start with the compression and leakdown testing.